<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>

  <body>
    <form>
      <input type="file" name="avatar" accept="image/*" placeholder="请选择头像" />
      <button>上传文件</button>
    </form>
    <img src="" alt="" class="avatar" style="width: 500px" />
  </body>
  <script src="./axios.js"></script>
  <script>
    const form =document.querySelector('form');
    const avatar =document.querySelector('.avatar');

    form.addEventListener('submit',function(e){
      e.preventDefault()

      const fd = new FormData(this);
      
      console.log(fd.get('avatar'));

      axios 
      .post('http://ajax-api.itheima.net/api/file',fd)

      .then(({data:res})=>{
        const url = res.data.url
        avatar.src =url
      })
    })


  </script>
</html>
